Bolt-retainer.



. H. BAUER.

BOLT RETAINER.

` APPLICATION FILED 09112, 1908.

937,039. Patented oct.19,1909.'

2. Effe?.

HENRY BAUER, OF BUDAPEST, AUSTRIA-HUN GARY.

BOLT-RETAINER.

Specification of Letters Patent.

Patenten eee.. 1e, ieee.

Application tiled October 12, 1908. Serial No. 457,376.

To all 'whom it may concern:

Be it known that I, HENRY BAUER, a sub ject of the King of Hungary, at (S6 Trabellacita, Budapest VI, Empire of Austria-Hungary, have invented certain new and useful Improvements in Bolt-Re. tainers, of which the following is a full, clean', and exact specification.

I, HENRY BAUER, architect, of Budapest in Hungary, do hereby declare the nature of this inention and inwhat manner the same is to be performed, to be particularly described and ascertained in and by the following statement:

The object of my invention is to improve and facilltate the fastening of Whatever articles, as: parts of buildings, supports, machines, frames, signs and the likel to walls and residing or foundations or other pieces of stone,-

brick, concrete, or other masonry, whose material alfordsfnot the possibility of inlinediate securing with screws or nails or the like.

The means used hithertoto this end: as wooden plugs, or the tapered heads of screws, or wedges, fastened into holes of walls with the help of plaster or cement, lead or brimstone, are subject to many deficiencies anddisadvantages. Even the newest wedge-screws 'and expansioirbolts, combined with the diversely Ashaped coins, or split shells of metal, or vcorrugated sheet metal, show many imperfections and especially this, that those wedges or slotted shells are expanded divergently and pressed only at their ends against the walls of the hole. A

The present invention affords to such wall fastenings a new means, which is easy to fabricate and to use, and being, in its employing, pressed at its entire length to the ywalls of the hole, affords a far stronger fastening, without necessitating the use of plaster, cement etc. v

The accompanying drawings, referred to hereinafter, represent this lneans of fastening in: Fivure l, showing the longitudinal scc- .'on o' a mantled nut l, with screw; Fig. 2, showing the same section of a @mantled screw with nut; Fig. 3, showing the same of a mantled plug with screw; Fig. 4, showing the transversal section of the lundulated mantle, through I-I; Fig. 5, showing the same through II-II; Fig. 6, showing; the elevation of the undulated mantle Fig. 7, 4showing the transversal section of the angular form of the same; Fig. 8, showing the perspective View of the undulated plate wedge As shown by the drawings quoted above, this new means of fasteningconsists in a mantle, or shell of plate (a. Figs. l, 2, 3, 4, 5, 6, 7,) undulated in such manner, that the undulations being deeper at one end (Fig. 4) and shallower toward the other end (Fig. 5) and all together flattened out at the edge, by this successive and continual decreasing of the depth of the undulations, the plate gets the shape of a Wedge (Fig. 8.) and the inner hole of the cylindrically or otherwise formed mantle (Figs. 1,2, 3,) of such plate is rendered conical. The equally conical nut (b. Fig. l.) or shaft of the screw (0. Fig. 2.) being placed into this conical hole of the mantle, as shown in Figs. l, 2, 3, thev whole mantled screw so combined, en tered in a hole of the wall, cut or bored with the like width or diameter, may be fastened most securely in the latter, by turning the screw (d. Fig. l) orthe nut (e. Fig. 2.) Instead of the conical nut n rounded cr angular wooden plug (f. Fig. 3.) can be used to the same effect, by which plug the mantle may be also expanded and fixed in the wall and, by means of the screw (g. Fig. 3.), any piece whatever .may be secured to this plug. In a plain form and in pieces of suitable length and breadth, the so undulated plate, may be used as an undulated plate wedge l, to various other fastenings.

Having now particularly described and ascertained the nature of my said invention and in what. manner the sam-e is to be used, ,l declare, that what l claim is:

l. A bolt retainer comprising in combination, a sleeve adapted to be inserted in a bore in the material and having open ends and a continuously closed wall, said wall be ing longitudinally corrugated with the con rugations relatively deep at the top of said sleeve and becoming gradually more sliallct;P at the lower end and merging into a' flat. snr face at the bottom of said sleeve, a threaded bolt member projecting into said sleeve and provided 'with a portion engaging'the part to be anchored,`and a wedge member having threaded engagement with said bolt member and frictional engagement with said sleeve.

2. A bolt retainer comprising in comi' gli tion, a sleeve adapted to be inserted in a here -f in the material and having open ends and a continuously closed wall, said wall ben'lg .nwgi-uimlly corrugated with the corrugaiwns relalvey aap ai; the nop of Said Sleeve and becmng graduay more shallow al the Bower and thereof, a threaded member pro- 5 jacking into said slams :m pxfovded with a. lpox?tmm enga5mg the pars o be wchomd, and a wedge member having threaded en- @agement with Sad halb member and fricwally engaging the corrugamns of said Sleeve.

11 esizimfmy whereof alx my Signatura" in the presencia of two Witnesses,

HENRY BAUER.. 

